Today, eight months after the mayor’s promise, the administration’s rated just 23 out of 700 city shelters.

Confronted with this embarrassment, de Blasio got stern: “Those scorecards,” he vowed Friday, “will happen by next month. If they don’t happen, a lot of people will be in trouble.”

What’s next, Mr. Mayor — a strongly worded letter to . . . yourself?

This, after a year when the administration effectively sat on its hands as the homeless crisis grew — and even denied it for months, though homeless-related complaints to 311 are up 127 percent since he took office.

Who’s going to believe the mayor is “taking the gloves off” and “owning this issue 110 percent” — when he forgot to enact his own “accountability system”?

When it comes to report cards on homelessness, he’s so far earned a big fat F.